Double-jet control device



Sept. 30, 1930.; J. MUGL ER 1,776,817

m DOUBLE JET CONTROL DEVICE Filed Sept. 20, 1929 lnvemom Patented SephBO, 193D UNITED AT PATENT JULIUS MUGLER, or Bullet n, GERMANY DOUBLE-JET CONTROL :onvror. i

Application filed. September 20,1929, Serial No. 334,071, and in Germany. July 3, 192s.

Single jet control devices'for measuring apparatus and regulators are known in which the fluid jet is controlled by an impulse-in fluenced, movable pipe. Double jet control 5 devices are also known in which fluid jets are'discharged from' a stationary member and are supplied through an impulse-actuated double slider having co-axial apertures over a free space to two opposite offset sta- 1o tionary apertures. In contrast thereto according to the present invention a double jet control device is provided in which two jets discharged from a stationary pipe are re ceived directly by an impulse-operated fork 15 provided with offset openings and are supplied through the movable fork to the measuring apparatus or servo-motor of a regulator.

This control device has therefore the advantages of a double jet'control device, but eliminates the diminution of the jet through the openings of the slide valve and the free space which has to be bridged in the known double jet control device.

The new double jet control device is illustrated in the accompanying drawing in combination with a servo motor,

Figure 1 is a side elevation partly in section,

Figure 2 is a diagrammatic plan view, and Figure 3 is a sectional elevation on the line 3-3. The operative fluid or liquid which enters at 1 is discharged through outlets 2 and 3 in two streams or ets. Opposite these outlets 2 and 3 are located the off-set receptor openings 5 and 6 provided in a fork 4. Two channels 7 and 8 extend through the fork 4: from these openings to the fulcrums 9 and 10 of the fork. At these points pipes 11 and 12 are connected to the fulcrum ends of the channel and serve for'conducting the fluid admitted through the openings 5 and 6 to the servo motor, for example to both sides of a piston 13. 14 is the device which produces the impulses and comprises as shown for example a membrane acted upon by the pressure of the medium to be regulated through the impulse pipe 15. The de- 5 flections of this membrane produced by the charged from pressure variations of the medium to he regulated are transmitted to the fork foreX- ample, by a plunger 16. A weight, or as illustrated, a spring 17 acts as a 'coun'terweight to the pressure acting on the menibrane. By ad usting the spring 17 the pressure which for example is to be maintained constant the control device may be ad;

justed to a predetermined degree.

The operation is as follows The pressure Variation of the medium to be regulated, for example, the pressure variatlon in a steam p pe 18, is transm tted t the impulse pipe toitlie membrane "14E.

This becomes deformed and'accordingly rocks t thefork 4:. If the fork .rockedfor'example so that the opening 5 tli'ereinregisters with the outlet 2, the pressure "fluid di s} the'latter enters the opening 5 and is cOnduc'tedthrQugh channel 7 to the side 19. of piston 13. The outlet 6 on the other hand is freed and the fluid on' the op posite side of the piston "passes through pipe 12 and channel 8'out through the opening 6. The piston 13 is moved upwards and controls the regulating member, for example, throttle valve 11, until the desired pressure is restored in the pipe 18. Thereupon the fork 4c is also returned to an intermediate position, that is to a position in which the openings 5 and 6 are simultaneously in part registration withthe outlets 2 and 3 so that both the sides 19 and 20 of the piston are acted upon by the same pressure with the, result that the piston remains in the rest po' sition until a new impulse is produced by further variation in pressure.

By making the member. from which the two jets 2 and 3 are discharged'movable in the same direction asthe fork and by making this displacement in proportional dependence, for example, upon movement of the piston 13 in such a manner that the jet member always follows the movement of-the fork, a double having a progressive action.

Claims:

1. A double jet control device comprising 'et'control device is obtained eleueh 7 element the fluid tor openings, means to direct currents of fluid into said openings and including a pair of et openings each of which is adapted to cooperate with av respective receptor opening, the openings of one of said pairs being offset with regard to one another so that a movement of said member in either direction causes one receptor opening relatively to approach its correspondinget opening and the other receptor opening to move away from its etopening or vice versa, and a device operated by differential fluid pressures and including a movable element exposed on the one hand to the fluid pressure existing at one receptor opening and on theother hand to the fluid pressure existing at the other receptor opening.

I 2A double-jet control device comprising a fork, having two receptor openings directed toward one another and offset from one another, means for'providing a pair of alined jet outlets directed'awa-y from one another andadapted each to cooperate witha receptor opening, means to'move said fork so that upon movement in one direction one of the said outlets is brought toward alinement with its receptor opening and the other jet opening is moved'away from its receptor opening, and

vice Versaupon movement in the other direction, and a device operated by differential fluid pressures and includlng a movable elen1ent, and means to impose upon one side of said element the fluid pressure existing at one receptor opening and on the other side of said pressure existing at the receptor opening.

In testimony whereof I have signed my name to this specification.

JULIUS MUGLER. 

